Talking machine



FbQ '16 192 6. f

I 1,573,348 w. LAWRENCE TALKING MACHINE Filed'March 8, 1924 2Sheets-Sheet 1 Imam-mm I G. Lawrence Feb. 16 1926." 1,573,348

- G. w. LAWRENCE I TALKING MACHINE Filed March 8, 192 2 Sheets-Sheet 2 6m ,7" W? L G, YY, Lawrencc Patented Feb. 16, 1926.

barren stares PATENT OFFICE.

TALKING MACHINE.

Application filed. March 8, 1924. Serial No. 697,865.

. ed certain new and useful Improvements in Talking Machines of whichthe following is the specification.

The invention relates to improvements in talking machines andparticularly to a winding appliance for the motor of a talking machineand an object of the invention is to provide a winding crank locatedabove the motor board and beneath the turn table and controlling thewinding of the spring motor and rotatable in winding around the turntable, such winding arrangement permitting of the easy Winding of themotor in a comparatively few turns of the crank and maintaining thecrank in an unexposed position and such that it is entirely enclosedwhen the customary cover of the talking machine is closed.

A further object of the invention is to arrange the appliance in asimple, durable and efficient manner and so that it can be readilyassembled or dismounted as occasion may require.

With the above more important objects in view the invention consistsessentially in the arrangement and construction of parts hereinaftermore particularly described and later pointed out in the appendedclaims,

reference being had to the accompanying drawin s in which Fig. 1 is asideviewof the invention as it appears installed on a talkingmachine.-

Fig.2 is a. plan view of the motor board of the machine and the turntable, part of the turn table being broken away to expose construction.

Fig. 3 is an enlarged detailed vertical sectional View centrally throughthe turn table and associated parts.

Fig. 4 is a horizontal sectional view at tl Fig. 3 and lookingdownwardly.

Fig. 5 is a horizontalsectional view at 55 Fig. 3 and looking upwardly.

Fig. 6 is an enlarged detailed vertical sectional view through the upperend of the driving shaft and associated parts,

Fig. 7 is adetailed sectional view showing the friction shoe and turntable shaft.

In the drawings like characters of reference indicate correspondingparts in the several figures.

The motor board 1 is the same as that customarily employed in talkingmachines, such carrying the talking machine motor utilized to drive theturn table. Rearwardly the motor board carries the tone arm 2 which isfitted with the customary sound box 3 carrying the stylus or needle 3t-Centrally of the motor board is the turn table shaft- 5 which carriesthe turn table 6 on which the customary record 7 is placed, the recordbeing played by the needle in the usual way during the rotation of therecord.

The above parts are all of ordinary construction and form no part of myinvention with the exception of the turn table spindle which isspecially constructed as shortly described.

I might here point out, however, that it is to be observed there is aclearance space be tween the rear side of the turn table and the frontside of the tone arm, such permitting of the free turning around theturn table of the special crank which I provide. 8 and 9 are upper andlower bearing plates suitably spaced apart and fastened together byspacing posts 10. These plates and posts form what might be called themotor frame and the said motor frame is suitably supported from theunderside of the motor board, there being, a space reserved between thetop plate and the underside of the motor board.

The turn table shaft 5 is rotatably carried in suitable bearings formedin the plates, the upper end of it projecting through a comparativelylarge opening 11 in the motor board and being fitted with a cross pin 12which is adapted to enter a cross slot 13 provided in the lower end ofthehub 6 of the turn table. This slot and pin arrangement is provided tocause the rotation of the turn table with the shaft and at the same timepermit one to remove the turn table by raising it if desired.

The plates 8 and 9 provide bearings also for the motor driving shaft iton which is rotatably mounted 1:119 cup like spring casinner end fast tothe shaft and the outer end fast to the casing. v

I have not considered it necessary to enter into the details of thisarrangement as it is a well known construction, being found onpractically all spring motors now on the market.

On the upper end of the main shaft between the plate 8 and the motorboard I 10- cate a ratchet wheel 18 and a gear wheel 19, these bothbeing keyed. to the main shaft as indicated at 20. The plate 8 carries aspring pressed dog or pawl 21 engaging the teeth of the ratchet wheel 18and the said teeth and dog are arranged such that a clockwise rotationof the shaft is prevented by the dog engaging with the teeth. The gearwheel 19 is meshed with a gear wheel 22 rotatably mounted on a sleeve 23rotatably carried by a spacing sleeve 24 rotatably mounted on the upperend of the spindle 5. Here it will be observed that the upper end of thesleeve 23 is in the form of a socket which receives freely the hub likeextension of the turn table and also the cross pin 12. The gear wheel 22is supported rotatably on the sleeve 23 by a ratchet'wheel 25permanently keyed to the sleeve and rotatable therewith.

A spring pressed pawl or dog 26. is carried by the wheel 22 andengages'thc teeth of the ratchet wheel 25, the dog and ratchet wheelbeing constructed such that a clockwise rotation of the sleeve 23 causesthe rotation of the wheel 22.

27 is a horizontally disposed winding crank or'lever radial to the upperend of the sleeve .13, the inner end of the crank being permanentlysecured to the upper end of the said sleeve, whereby the sleeve is 1'0-tated when the lever is turned, The lever is somewhat longer than theradius of the turn table and it is fitted at the outer end with anupturnedextension 27 supplied with a vertically disposed finger andthumb grip 28.

Obviously the lever can be rotated by grasping the finger piece andswinging it around the turn table and such movement willproduce a rotarymovement of the sleeve 23-and ratchet wheel secured thereto.

A fly ball governor 29 of the customar form is provided, the governorshaft 30 being suitably carried by the plates 8 and 9. The governorshaft is rotated by a small pinion 31. secured thereto and in mesh withthe driving gearwheel 32 fastened to the lower end of theshaft 5. Theshaft 5 also carries a small. pinion 33 meshed with a large driving gear34 secured to a countershaft- :35 carried by'the plates. The saidcountershaft is also supplied with a pinion 36 which meshes with a largegear wheel 37 carried by a second countershaft 38 having hearings in theplates. The shaft 38 is fitted with a small pinion 39 which meshes withthe driv ing gear wheel 16.

The train of gears and pinions latterly described are utilized to drivethe shaft 5 and the governor and are selected to give a proper drivingspeed to-the shaft 5 and governor for normal working conditions. Theunderside of the plate 8 carries pivotally an arm 40 which is fittedwith a brake shoe 41 normally engaged with the shaft 5, being held incontact therewith by the action of a coiled spring 4-2. The outer end ofthe arm is connected by means of a link 43 to a lever 44 located at thelower end of a spindle l5 carired by the motor board, the said spindlebeing fitted at the'upper end with a push crank 46. v

The arrangement of the latter parts is such that when the crank 40 ispushed in a proper direction it will relieve the brake shoe from theshaft and such that when the brake is engaged with the spindle the shaft5 is prevented from rotating. The operation of the appliance is nowdescribed.

When one desires to wind the motor he catches the finger piece 28 andturns the winding lever in a clockwise direction. As the lever turns thedog 26 effects the rotation of the gear wheel 22 with the ratchet wheel25 which latter is fixed to the sleeve Accordingly the gear wheel 22rotates the gear wheel 10 in a counter-clockwise direction, that is in adirection which causes the dog 21 to escape over the teeth of theratchet wheel 18. As the gear wheel 19 is permanently secured to thedriving shaft 14 the spring 17 iswound within the casing and in thiscoimection it is explained that the easing is prevented from rotating onthe shaft by the action the brakeshoe which prevents any rotation of theshaft 5 until released.

It will be observed that the train of gears and pinions connect the gear16 with the shaft 5-so that if the said shaft is prevented from rotatingby the brake shoe the gear 16 becomes automatically locked. During thewinding action the turn table and disc thereon remains stationary as thewinding lever revolves around the shaft 5 and the shaft is lockedagainst rotation by the brake shoe. However, as soon as the brake shoeisreleased from the shaft 5 the said shaft is rotated as is also thegovernor, the spring 17 then rotating the gear wheel 16 around the shaft14' and acting through the train of gears to drive the shaft 5 and thegovernor.

During this latter driving movement the gear 19 and ratchet wheel 18 arepositively prevented from rotating by the'dog 21.

I have found that for the average sized talking machine motor twocomplete revolutions of the winding crank will wind the spring 17sufiicient to play what is known as a ten inch record and that threeturns of the winding crank will play a twelve inch record. Accordinglythe winding of the motor in my machine takes very little time whencompared with the crank winding which has to he done with the greaternumher of machines now on the market. Further, by having the windinglever positioned in the manner herein described there is no crankexposed when the customary top of the gramophone is closed down. Thisimproves the general appearance of the machine and avoids having anyprotruding part liable to catch on the clothes of one passing themachine.

WVhilst I have entered into a detailed description of the various partsit will be readily understood that I do not wish to be limited to thedetails of the construction shown as these could be readily modifiedWithout departing from the spirit of the invention as set forth in theappended claims.

What I claim as my invention is 1. In a talking machine, the combinationwith a spring actuated motor presenting a driving shaft, a turn tableshaft and a turn table carried by and rotating with the turn tableshaft, of a winding crank revolvable around the turn table shaft andextending outwardly beneath the turn table and pro vided at its outerend with a hand grip, ratchet controlled intermeshed gears for effectingthe rotation of the motor driving shaft to wind the motor spring and inthe rotation of the crank in a pre-determined direction, releasablefriction means preventing the rotation of the motor shaft subsequent tothe spring being wound and a train of gears and pinions connecting themotor with the turn table shaft and adapted to rotate the turn tableshaft upon the aforesaid friction means being released.

2. In a talking machine, the combination with a spring actuated motorpresenting a driving shaft, a turn table shaft and a turn table carriedby and rotatable with the turn table shaft, of a sleeve rotatable aroundthe turn tahle shaft, a winding crank having the inner end thereofpermanently secured to the sleeve, the outer end thereof provided with ahand grip revolvahle around the periphery of the turn table, a ratchetwheel secured to the sleeve, a gear wheel rotatably mounted on thesleeve and provided with a spring pressed dog engaging the ratchetwheel, the dog operating to turn the gear wheel upon the crank beingturned in a clockwise direction around the sleeve, a gear wheelpermanently secured to the motor driving shaft and meshing with theformer gear wheel, means preventing the turning of the latter gear wheelunder the influence of the motor spring, a driving gear rotatablymounted on the driving shaft and adapted to be driven by the spring ofthe motor and an intermeshed train of gears and pinions between thelatter gear wheel and the turn table shaft and a brake shoe engagingwith the turn table shaft and adapted to prevent the rotation thereofunder the action of the wound spring until said shoe is released.

Signed at lVinnipeg, this 15th day of February 1924.

GEORGE W. LAWRENCE.

